Window-sash lock.



PATENTBD APR. .7, 1908.

M. H. GABA.

WINDOW SASH LOCK.

urLIoArrIoN Hun 23.24. 1807,.i

`MELVIN H. GABA, OF DAYTON, OHIO.

WINDOW-SASH LOCK.

Specication of Letters Patent.

Patented April 7, 1908.

Application filed. April 24:, 1907. Serial No. 369,902.

To all whom 'it may concern:

Be it known that l, MELVIN H. GABA, a citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Window-Sash Locks; and I do declare the following to be a full, clear, and eXact description of the invention, such as; will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relates to improvements in window sash locks, and possesses the new and useful features illustrated in the accompanying drawings and described in the annexed specification and claims.

Briefly stated the invention comprises means for more positively receiving and disengaging a toothed wedge from a rack in lowering and raising the window sash; means for more effectually locking the window sash in position by locking the toothed wedge in engagement with the rack.

In the accompanying drawings,-Figure .1 is an elevation of one side of a window sash and the frame-work showing the sash lock in osition, portions of the window sash and frame being broken away. Fig. 2, is an ele-v vation at right angles to Fig. 1. Fig. 3, is a detached'view of the sash lock looking in one position in which the frame supporting the toothed wedge is in its upper rack-engaging position. Fig. 4, is a similar view showing the frame supporting the toothed wedge in its lower disengaging position. Fig. 5, is a top view of the lock with a portion of the window sash shown in section. Fig. 6, is a detail view of the toothed wedge and its su porting frame showing the lock casing in sic e elevation. Fig. 7, is a detached. view of the toothed wedge and supporting frame.`

ln a detail description of the invention, similar reference characters indicate corresponding parts.

The casing 4 in which the sash-locking devices are mounted, is secured'to the lower portion of one side of the window sash 3 at a suitable point above the window sill 6 g a suitable number of screws penetrate the end extensions 5 0f the casing and thus secure the same to the sash. Slidinglymounted within this casing is the frame shown in Fig. 7, and consisting of a horizontal arm 7 which joins an upright portion S on one end and a toothed wedge 9 on the other end, the upright portion 8 lying within the casing and the toothed wedge 9 lying on the outside of the casing. The horizontal portion 7 of said frame has an inlying surface 10 which lies against the side of the window sash and an inoline off -set 11 which, together with the toothed rack 9 lies within a suitable recess or recesses 12 in said sash; the toothed side of the wedge lying outwardly to engage the rack 13 to be again referred to. The horizontal portion 7 of said frame extends through an opening in the side of the casing 4 of sufficient length to permit said frame to have the necessary vertical movement, and the lower inner side of said opening has a cam surface 14 which is adapted to engage the surface 11 of the frame to cause a disengagement of the toothed wedge 9 from the rack 13 when it is desired to raise or lower the sash. The end of the upright portion 8 of the frame has an extension 15 which is engaged by one end of the spring 16, the other end of said s ring engaging a pin 17 on the lever 18. T is finger lever 18 has its lower surface suitably curved to act as a cam upon the upper surface of the horizontal portion 7 and is pivoted above said horizontal portionV at 19, the spring 16 maintaining it and the frame in the upper position as shown in Fig. 3. The lower end of the upright portion of said frame has a pivot pin 20 Vwhich projects into a suitable opening in the bottom of the casing and acts as a pivot for the frame to move on to disengage the `toothed wedge 9 from the rack 13 in lowering said frame against the inclined surface 14 of the lock frame.

21 is an locking lever pivoted in the casing at 22 and having an upper extension 23 designed to engage the lower side of the horizontal portion 7 of the toothed wedgesupporting frame to normally maintain said frame in its upper position as shown in Fig. 3, the said lever 21 being held in the position shown in Fig. 3 by the spring 25. It will be understood that the toothed wedge 9 when thus held by the lower locking lever 21 is maintained in engagement With the rack 13. To permit of the disengagement of said parts, the finger levers 18 and 21 are moved toward each other by the fingers; this movement brings the extension 23 of the lower lever in a line with the recess 24 on the horizontal part of the frame and permits said frame to be moved down by the upper lever 18, and

the sash may then be raised or lowered as the case may be. Inclosing the outer inclined surface of the toothed wedge 9 is an incline guide 26 which is embedded in a recess in the Window sash so that the toothed wedge 9 is inclosed between this inclined surface and the rack g the said inclined surface permits of the toothed wedge being with* drawn from the rack when the sash is lowered a sufficient distance and the toothed wedge is enabled to move out from the rack by the engagement ofthe horizontal portion of the frame with the cam surface 24 of the lock casing, and the inclined surface 26 causes the toothed Wedge to engage the rack when the sash is moved up and until the locking lever 21 moves out of the recess 24 in said frame. The toothed rack 13 is secured to the outer perpendicular edge of the inner sash strip 2.

Having described my invention, I claim:

In a window sash lock, a rack attached to a sash strip, a toothed wedge adapted to engage said rack, a frame supporting said toothedrack and having a sliding and pivotal movement, an actuating iinger lever above said frame and a locking lever below said frame, said frame and levers being inclosed within a casing attached to the window sash, and an inclined guide inclosing the outer side of the toothed wedge, said inclined guide being mounted in the window sash, substantially as specified.

In testimony whereof I affix my signature, in presence of two witnesses.

MELVIN H. GABA. I Witnesses:

CAROLYN M. THEOBALD, R. J. MCCARTY. 

